Riveting apparatus.



J. J. SPILLANE.

RIVEHNG APPARATUS.

APPLICATION FILED MAR. 27, I918.

Patented Oct. 8, 1918.

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JOHN J. SPILLANE, OF PORTLAND, OREGON, ASSIGNOR OF ONE-HALF T0 COLUMBIA RIVER SHIPBUILDING CORPORATION, OF PORTLAND, OREGON.

RIVETING APPARATUS.

Specification of Letters Patent.

Patented ea. s, 1918.

i Application filed March 27, 1918. Serial No. 225,107.

To all whom it may concern:

Be it known that I, JOHN J. SPILLANE, a citizen of the United States, residing in the city of Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Riveting Apparatus, of which the following is a specification.

My invention relates to devices for holding the riveting hammer in place during the riveting operation, and in the apparatus shown in the drawings, is especially adapted for use in constructing circular boilers and tanks. In addition to furnishing a support for the air gun or hammer, my apparatus, by means of fluid pressure assists to hold the end of the hammer firmly against the rivet and an auxiliary air cylinder provides an air cushion which absorbs much ofthe shock of the constant vibration.

Referring to the drawings, Figure 1 is a side elevation with arms 4 and 15 removed. Fig. 2 is a plan. Fig. 3 is an end elevation of the lever 11, yoke 19 and the universal joint 20 which holds the front end of the riveting hammer 21'.

The apparatus as described herein was designed for riveting heads on circularboilers, although the principle of operation disclosed may be adapted to any form of riveted plate construction. 1 shows the top of a circular boiler or tank, with two rows of rivets joining the top plate to the body of the boiler or tank. The stand 2 and pivot pin 3 are centrally located on top of the plate 1 and the arm 4 swings around this pivot as a center. Arm 4 is bifurcated as shown in Fig. 2, the extensions being numbered 4 and 4, but will be referred to as arm 4. The bell crank lever is held between these arms as shown, the roller 6 being placed on the longer arm of the bell crank so that it will rest on top of the boiler plate 1 and facilitate moving the arm 4 around the pivot 3. The rod 12 engages the shorter arm of the bell crank5, so that it can turn freely therein and by means of the screw part 14 on this rod and the threaded head 13 of the pin 25, Fig. 2, the bell crank may be adjusted in its position so as to raise and lower the bifurcated arm 4. At the end of this arm, between 4 and 4, are pivoted the two parallel plates 15 and 15, Fig. 2, forming a holder for the air cylinder 7, lever 11, and jointed arms 17 and 18, Fig. 1. The back end of the cylinder 7 is pivotally mounted between the plates 15 and 15 on the pin which joins the ends of the plates and the piston rod 10, Fig. 2, is attached to the top of the lever 11, which is held between the plates as shown, Fig. 1, so that its lower arm can be moved toward and away from the rows ofrivets. A lug 26 is pivotally held between the plates at their forward end and the link 17 is joined to this lug so that it can swing transversely thereto. At the lower end of lever 11, is a yoke 19, Fig. 3, in which is mounted the universal joint 20, which supports the front end of the air gun or hammer 21. The arm 18 also supports the hammer, its lower end being clamped to the body of the hammer a short distance back from the yoke 19 and its top end being joined to the lower end of the link 17 Fig. 1, so that it can swing in the same direction. I

To operate the device it is placed on top of a circular boiler as shown'and the stand 2 fastened to the top plate so that the pivot 3, around which the arm 4 turns is approximately at the center of the circle along which the rivets are distributed. By turning the handle 16 of the rod 12, the screw14 will alter the position of the bell crank lever 5, raising or lowering the arm 4 as desired, so that the end of the hammer 21 may be accurately placed against the rivet, as 22. A valve, not shown, on the air hose 8, Fig. 1, is placed conveniently near the operator and air under pressure is admitted to the cylinder 7; this assists the operator in holding the hammer against the rivet, and also provides an air cushion which absorbs the shock of the constant vibration to which the hammer is subjected when in action and which jars the operator continuously. The hammer being held by the universal joint 20 and the linked arms 17 and 18, can be easily manipulated to put the proper shaped head on the rivets. The hammer is then moved to the next rivet, the arm 4 turning on the pivot 3 and being supported by the roller 6 which permits the ap paratus to be moved freely to the desired position. In the drawings the apparatus is shown in position for working on the lower row of rivets; if it is desired to work on the top row, by turning the rod 12, the screw 14 will shorten up the distance between 13 and the shorter arm of the bell crank lever 5 and 'is being riveted and thus the position of the stand and apparatus may be easilyshifted. It is evident that many variations of my device may be made all Within the scope of my invention and therefore I do not limit myself to just the precise form of apparatus set forth.

1-. In a riveting device, a longitudinal bifurcated arm, a bell crank lever journaled on said arm, a roller mounted at the end of the lower arm of said bell crank lever, means for holding the bell crank in adjustable relation to the longitudinal arm, a pair of plates pivoted between the outer ends of the bifurcated arm, a fluid pressure cylinder and piston pivotally mounted between the said plates atone end thereof, a lever positioned etween the plates, its top end. attached to the piston of the fluid pressure cylinder, a universal joint at the lower end of said lever adapted to receive the forward end of an upsetting tool, and a linked arm pivotally attached to the outer end of the said plates opposite the said fluid pressure cylinder,

' adapted to clamp andsupport the upsetting tool.

2. In a riveting device, a longitudinal arm,

adjustable means for raising and loweringsaid arm, fluid pressure means pivoted at the outer end of said arm, and a lever actuated by said fluid pressure means adapted to receive an upsetting tool at its lower end.

3. In a riveting device, a; longitudinal arm, a bell crank lever on said arm, one arm of the bell crank having a roller at its lower end, a rod which engages freely the other arm of the bell crank and having a threaded part thereon, a nut on said longitudinal arm in which thethreaded part of the rod turnsso that the relation of the bell crank and longitudinal arm can be altered.

4.111 I a riveting device, a longitudinal. arm, a holding plate centrally pivoted at the outer end of said arm, a fluid pressure cylinder and piston pivotally mounted at the top end of said plate, a lever fulcrumed between the lower end of the said plate and its pivot, the top end of said leverbeing attached to the piston of the fluid pressure cylinder and swiveling means at the lower end of said lever adapted to hold an upsetting tool.

5. In a riveting device, a longitudinal arm, a holding plate centrally pivoted at the outer end of said arm, a fluid pressure cylinder and piston pivotally mounted at the top end of said plate, a lever fulcrumed between the lower end of the said plate and its pivot, the top end of said lever being attachedto the piston of the fluid pressure cylinder, swiveling means at the lower end of said lever adapted to hold an upsetting'tool, and a linked arm pivotally attached to the'lower end of said plate likewise adapted to clamp the upsetting tool.

6. In a riveting device, a longitudinal arm, fluid pressure means pivoted at the outer end of said arm and a lever actuated by saidfiuid pressure'means adapted to receive an upsettingtool at its lower end,

JOHN J. SPILLANE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner oflatents,

Washington, D. C. w a v 

